There are no firm numbers on how long Seidio's giant battery case will keepyour phone going, although it's definitely far longer than the original.

The only problem is that batteries with this kind of capacity are large. So large, in fact, that it turns your phone into some kind technological hunchback. Don't just take my word for it, either: check out the picture below. It also writes off your ability to use NFC, which you may, or may not, care about.

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But apart from the fact that it is (a) incredibly ugly, (b) doesn't do NFC and (c) will make people wonder what the bulge in your trousers is, it's a great idea. If you're happy with those three problems, it costs $69.99. [Seidio via Droid Life vis Ubergizmo]